Relay and overload protector are no longer available for my fridge
So I'm forced to replacing it with a 3 n 1 start RC0410 not sure on the
Wiring I know we're the red,white & blk wires go but not sure of the other
2 black wires go

Do NOT use the 3 n 1, it will blow out your compressor.
If you have a square, black item connected to two compressor terminals, that is the ptc start device. You need to make ohm meter measurements on it so I can help you.
Also, it would help to state your problem.

Fridge was not staying cold compressor was not starting I took out the relay and shook it and it sounded like everything was broken inside. Yes the relay has 2 wires a pink one and a blue one and the overload protector has a black wire
I checked the compressor with an ohm and it was fine

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